Crushing-machine.



-W. A. BOX.

GBUSHING MACHINE.

APPLICATION rum) APR. 20, 1908.

1,007,059, Patnted 0011.31, 1911.

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W. A. BOX.

CRUSHING MACHINE.

APPLICATION nun APILZO, 190a.

Patented Oct. 31, 1911.

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WITNESSES:

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UNITED STATES PATENT OFFICE.-

WILLIAM A. BOX, 01? DENVER, COLORADO.

CRUSHING-MAOHINE.

To all whom it may concern:

Be it known that I, WILLIAM A. Box, a citizen of the United States of America, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Crushing-Machines, of which the following is a specification.

This invention relates to certain new and useful improvements in crushing machines and more particularly to that class of machines in which the ore or other material to be reduced, is fed between two revolving, parallel crushing rolls which are mounted either in yielding or fixed relation to each other.

The object of my invention is to provide an apparatus of the class named in which simplicity of construction is combined with durability and rigidity of its parts: in which the bearings employed to support the rolls are of symmetrical design to allow their reversal in case of wear: in which the bearings which support the movable crushing element are self-adjustably mounted for the purpose of evenly distributing the pressure upon the two rolls, caused by the matter which passes between them, and in which the bearings which support the rigid crushing element are longitudinally adjustable to maintain the said element in perfect alinement with the movable one and thus prevent fianging and uneven wear of their circumferential surfaces.

Further objects of my invention are to provide means whereby a machine of the socalled spring-roll type may readily be converted into one of the rigid roll type by placing the normally spring-actuated loose roll in fixed relation to the opposite one: to provide a simple adjustment, which, being adapted to determine the minimum distance between the rolls, effectively prevents over crushing and a resultant undersized product and finally to provide indicatory means which, by denoting the relative positions of the boxes, which support the movable element, greatly facilitate paralleling of the shafts which carry the two rolls comprised in my machine.

I attain these objects by the mechanism illustrated in the accompanying drawings in the various views of which like parts are similarly designated and in which Figure 1 represents a composite plan view and central horizontal section of the Specification of Letters Patent.

Application filed April 20, 1908.

Patented Oct. 31, 1911.

Serial No. 428,093.

apparatus from which the casing has been removed, Fig. 2 a side elevation of the device, Fig. 3 a transverse section taken along the line 3-3, Fig. 2, one of the boxes having been shown in elevation, and Fig. 4i a fragmentary view of one of the ends of the bed frame, illustrating the method of applying the means employed to place the normally spring-actuated loose roll in fixed relation to the opposite one.

Referring to the vdrawings, thereference character 5 designates the bed frame or base of the machine,.comprising upright sides 5 which have been recessed, in adjacency to one of their ends, for the reception of the stationary journal boxes 6 which support the crushing roll 7 The opposite roll 8 is revolubly mounted in bearing boxes 9 which are slidably disposed within elongated recesses 10 in the opposite ends of the upright sides of the frame, and tension bars 12, which are rigidly secured in engagement with the upper edges of the said sides, serve to hold the various boxes against vertical movement and to provide one of the two parallel slides between which the boxes 9 are guided during their lateral reciprocating motion. Themovable journal boxes 9 are provided at their horizontal surfaces with centrally disposed trunnions 13 which pro ject through correspondingly formed openings in flanged shoes 1 1 which, respectively, engage the parallel slides formed by the bars 12 and the lower, horizontal edges of the recesses 10 in the sides of. the frame. The boxes 9, which are thus pivotally mounted to move about a vertical axis and which likewise are capable of moving laterally toward and from the fixed roll 7, are engaged at one of their ends by the headed extremities of the adjusting screws 15 which serve to determine the minimum distance between the two rolls, and at their opposite ends by nests of helical springs which produce and maintain the requisite pressure by which the material passing between the rolls, is reduced.

The adjusting screws 15 are longitudinally movably supported in corresponding openings in the sides of the frame and may be locked in their adjusted position by means of nuts 16, one of which is disposed within a suitably shaped passage in the side of the frame While the opposite one engages the adjacent Vertical edge of the recess 10.

The springs 17 of each nest are held between two parallel plates 18 connected by bolts 19, which, by adjustment of the distance between the two plates, serve to maintain the springs under any given compression. The inner plate of each nest of springs has a central, outwardly projecting portion which occupies a correspondingly formed depression in the vertical end surface of the respective box 9 while the opposite plate is formed with a central depression into which projects the extremity of an adjusting screw 20 which is rotatably supported in a bore in the end portion of the respective upright side of the frame and which is held in its adjusted position by nuts 21 one of which is disposed within a suitably shaped recess in the said portion of the frame, while the other engages the vertical surface of a boss 21 upon its outer edge.

The two tension bars 12 are provided upon their outer vertical faces, with series of graduations 22 which being arranged equidistantly from their extremities, serve to denote the relative position of the two movable boxes for the purpose of facilitating the adjustment of the roll supported therein, in relation to that mounted in the stationary bearings 6.

The stationary boxes 6, which support the shaft 7 a of the-roll 7, may be moved longitudinally in relation to the said shaft by manipulation of adjusting nuts 23 upon bolts 2 1, which, being secured upon the stationary frame, project through openings in flanges 6 on the boxes 6.

The crushing rolls 7 and 8, which are, in practice, surrounded by a dust-proof casing 25, are each composed of two identical members 26 which are connected by means of bolts 27 seated in peripheral recesses in a driving member 28 which forms part of the respective sh aft and the said members carry a surrounding annular shell 26*, which, being composed of hardened metal, provides the working surface upon which the material, fed between the rolls, is crushed. The construction of the rolls has been made subjectof a separate application for patent filed simultaneously with. the present one.

It will be observed that the boxes 6 and 9, which respectively supports the shafts of the rigid and movable rolls, are of symmetrical configuration so that when the bearings become worn at one of their sides, the position of the boxes may be reversed for the purpose of presenting the opposite side of the said hearings to the outwardly directed action of the rolls and the therewith associated shafts.

To convert the springroll machine above described into a machine of the rigid roll type, the nests of springs which engage the movable boxes 9, are removed by withdrawing the adjusting bolts 20 and sleeves 29, illustrated in Fig. a of the drawings, are substituted therefor.

Each of the sleeves 29 has an enlarged extremity which, in practice, occupies the recess in the box 9, which formerly was filled by the central protuberance on the inner plate 18 of the respective nest of springs; and it is provided, in proximity to its opposite end, with a transversely disposed shearing pin 30 which provides an abutment for the extremity of the respective adjusting screw 20. The pins 30, thus employed, serve as a safe guard against the breaking of more essential parts of the ma chine when by accidental introduction of foreign articles such as nuts or tools in between the two rolls, the latter are excessively separated.

In the operation of the machine, power is applied to the rolls 7 and 8 by means of endless belts which, leading from the engine or other source of energy, pass around pulleys 31 which are mounted upon extensions of the hollow roll shafts, and, after the movable boxes 9 have been adjusted by manipulation of the screws 15 and 20, and in accordance with the graduations on the sides of the bars 12, and the springs 17 have been compressed to the requisite degree of tension, the material to be reduced is fed in between the rolls through a hopper which for obvious reasons has been omitted from the drawings.

The pivotal connections of the boxes 9 with the sliding shoes 14, in cooperation with the springs 17, will effectively avoid binding and wear of the two rolls by permitting the loose roll to laterally adjust itself when, on account of uneven distribution of the matter under treatment, the pressure at one of its ends exceeds that upon the other, while by longitudinal adjustment of its bearing boxes, the rigid roll may be maintained in perfect alinement with the opposite one to prevent hanging and uneven wear of the circumferential surfaces of the shells 26 The screws 15 furthermore guard against overcrushing while the interchangeable springs 17 and sleeves 29 afford adequate means to readily convert the spring roll machine into one of the rigid roll type and vice versa, and, in consequence, give the user the choice between two machines, each of which possesses its peculiar advantages for the eflective reduction of materials of varying character.

Having thus described my invention what I claim is The combination with a frame, having upright sides each formed with a pair of recesses at opposite ends and with an intermediate opening, and upper and lower pairs of flanged shoes engaged respectively with the corresponding horizontal edges in the recesses at one end of said sides, each pair of shoes being formed with alining openings, of a pair of alining bearing boxes slidable in the last" mentioned recesses, and provided With centrally disposed trunnions projecting side of each slidable box for shifting the 10 through the openings in said shoes; a pair same bodily toward the adjacent stationary of alining stationary boxes located in the rebox.

cesses at the other end of said sides; bolts In testimony whereof I have aflixed my 5 movable endwise in said intermediate opensignature in presence of two Witnesses.

ings and impinging at one end against the WILLIAM A. BOX. slidable boxes, for shifting the same bodily Witnesses:

away from the adjacent stationary boxes, G. J. RoLLANDE'r,

and additional means located at the opposite H. M. STUMP.

Co lies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

